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Installation fails because of missing root certificates in PTC Kepware Products

Modified: 16-Jul-2025   


Applies To

  • Kepware Server (formerly KEPServerEX) 5.20.396.0 to 6.18
  • ThingWorx Kepware Server (legacy) 8.0 to 6.18

Description

  • Installation fails because of missing root certificates with KEPServerEX / ThingWorx Kepware Server 
  • Error in installation instructed to Verify File Signature Installation failed. KEPServerEX-6.X is not trusted
  • Error in pop-up:
Installation failed KEPServerEX-6.8.796.0.exe is not trusted
Installation failed KEPServerEX-6.9.exe is not trusted
Installation failed KEPServerEX-6.10.exe is not trusted
  • KEPServerEX Installation fails due to root certificates on Windows Server 2016
  • KEPServerEX Installation fails with message:
The installer was unable to find required root certificates. Please apply windows updates.
  • Warnings from KEPServerEX 6.7/ThingWorx KEPWare Server 6.7 and earlier are below:
    • Error message in pop-up Check Root Certificates
    • Installation of KEPServerEX-[version].exe failed. The installer was unable to find required certificates. Please apply windows updates. If unable to apply Windows updates, contact support for instructions on installing root certificates
    • Error message indicating: "Installation failed. KEPServerEX (version) is not trusted"
    • Errors in C:\Program Files (x86)\Kepware\KEPServerEX\bootstrap.log  or  C:\Program Files (x86)\PTC\ThingWorxindustrialConnectivity\bootstrap.log: 
    • [Info] Check local computer, Trusted Root CAs, returned: -2146893807
      [Info] Check local computer, 3rd Party Root CAs, returned: -2146893807
      [Info] CheckRootCert, GlobalSign Failed, returned: 0x65B
      [Info] CheckRootCert, VeriSign Failed, returned: 0x65B
      [Info] CheckRootCert, MS_CRT Failed, returned: 0x65B
  • ​Root certificates needed
  • Error messages when upgrading PTC Kepware Products
  • When upgrading Kepware Ver6.4 to Ver6.18.296.0, an error message is displayed and the upgrade cannot be completed

    • Check Root Certificates

      Installation of C:temp\KEPServerEX6-6.18.296.0exe failed.
      The installer was unable to find required root certificates.
      Please apply Windows updates. If unable to apply Windows Updates, contact support for instructions on installing root certificates.

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